Fast and versatile, Sigma's Sony E-mount 50 mm f / 1.4 DG HSM is a normal length cousin designed to achieve high optical performance through the incorporation of three special low dispersion glass elements and one aspherical molded glass element. These elements, along with an advanced optical design, function to minimize sagittal comma flare and chromatic aberrations in order to provide high image sharpness and clarity. The large lens diameter and floating system also help correct vignetting to ensure high image sharpness and clarity. The large lens diameter and floating system also help correct vignetting to ensure vignetting to provide high image sharpness and clarity. The large lens diameter and floating system also help correct vignetting to ensure vignetting.
Complementing the imaging capabilities, the lens has a Hyper Sonic Motor to produce a fast, smooth and quiet autofocus with full-time manual focus override. The physical design uses thermally stable composite material for durability in a wide range of environments, and a brass bayonet mount also offers rigidity and mounting accuracy.